EP1546528A2 - Commande d'accelerateur electronique comprenant un dispositif d'hysteresis - Google Patents

Commande d'accelerateur electronique comprenant un dispositif d'hysteresis

Info

Publication number
EP1546528A2
EP1546528A2 EP03764776A EP03764776A EP1546528A2 EP 1546528 A2 EP1546528 A2 EP 1546528A2 EP 03764776 A EP03764776 A EP 03764776A EP 03764776 A EP03764776 A EP 03764776A EP 1546528 A2 EP1546528 A2 EP 1546528A2
Authority
EP
European Patent Office
Prior art keywords
pedal
pedal arm
friction
arm
hysteresis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03764776A
Other languages
German (de)
English (en)
Other versions
EP1546528A4 (fr
EP1546528B1 (fr
Inventor
Larry G. Willemsen
Dan O'neill
Peter Mishchenko
Rob Soteros
Greg Kocwich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KSR Technologies Co
Original Assignee
KSR International Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by KSR International Co filed Critical KSR International Co
Publication of EP1546528A2 publication Critical patent/EP1546528A2/fr
Publication of EP1546528A4 publication Critical patent/EP1546528A4/fr
Application granted granted Critical
Publication of EP1546528B1 publication Critical patent/EP1546528B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/30—Controlling members actuated by foot
    • G05G1/38—Controlling members actuated by foot comprising means to continuously detect pedal position
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/30—Controlling members actuated by foot
    • G05G1/44—Controlling members actuated by foot pivoting
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/03—Means for enhancing the operator's awareness of arrival of the controlling member at a command or datum position; Providing feel, e.g. means for creating a counterforce
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20528—Foot operated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20528—Foot operated
    • Y10T74/20534—Accelerator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20888—Pedals

Definitions

  • the present invention relates generally to electronic controls for vehicles, and more particularly, to an electronically controlled pedal with a hysteresis device.
  • Vehicles and in particular automotive vehicles, utilize a foot-operated device, such as a brake pedal or a throttle control pedal, also referred to as an accelerator pedal, to control the movement of the vehicle.
  • a foot-operated device such as a brake pedal or a throttle control pedal, also referred to as an accelerator pedal
  • Conventional brake systems include a brake pedal for transmitting a braking force from the vehicle operator to the wheels of the vehicle.
  • conventional throttle control systems include a throttle pedal to transmit a signal from the vehicle operator to a controller to control acceleration and movement of the vehicle.
  • Recent innovations in electronics technology have led to increased use of electronic controls for vehicle systems, such as the throttle system or the brake system.
  • the pedal arm is attached to a position sensor, which senses the relative position of the pedal arm and transmits a signal to a controller to operate the throttle.
  • the electronically controlled brake system operates in a similar manner.
  • the pedal arm is not attached to a mechanical device, such as a rod or cable, there is no resistance to depression of the pedal, and the pedal returns to a nominal position quicker than with a mechanical system. This resistance is referred to as hysteresis.
  • Hysteresis is advantageous because it provides the driver with a better "feel" of the pedal. Without a predetermined amount of hysteresis in the pedal, the driver may experience increased foot fatigue from the rapid adjustment of the pedal, especially when driving over a long period of time.
  • a mechanical device was utilized to simulate the resistance to depression produced by a brake rod or a throttle cable in conventional pedal system, and return the pedal to its resting position.
  • European Patent No. EP 0748713 A2 discloses the use of a spring to return the pedal to its resting position.
  • Another example of a mechanical device is a friction pad connected to an extension of the pedal arm to develop hysteresis during depression of the pedal.
  • previously known hysteresis devices are complicated and utilize many parts.
  • a position sensing device is known in the art to sense the relative position of the accelerator pedal as the operator depresses or releases the accelerator pedal in controlling movement of the vehicle.
  • a position sensing device is a potentiometer.
  • an induction sensor is another example of a position sensing device. While these types of sensors work well, they are relatively expensive and may be difficult to package within the confined interior environment of the vehicle.
  • a hysteresis device for use with an electronically controlled pedal that has a minimal number of component parts and is cost-efficient to produce.
  • an electronically controlled pedal with a hysteresis device includes a housing having a front wall and an arcuate friction wall having a radius of curvature centered on a pedal arm pivot point and extending from an edge of the front wall.
  • the pedal assembly also includes a pedal arm rotatably supported at the pedal arm pivot point by a mounting means operatively connected to the housing, and a hysteresis generating means pivotally mounted to the pedal arm.
  • the pedal assembly further includes a spring positioned between the housing and the hysteresis generating means, such that the spring biases the hysteresis generating means against the housing, so that depression of the pedal arm compresses the spring while generating an increasing frictional hysteresis force between the arcuate friction wall and the hysteresis generating means that is translated back through the pedal arm, and release of the pedal arm reduces the frictional hysteresis force.
  • an electronically controlled pedal assembly is provided that includes a hysteresis device to simulate the resistance to depression of the pedal.
  • the hysteresis device for the electronically controlled pedal is simpler in design than previous designs, to enhance packageability within the interior environment of the vehicle.
  • the hysteresis device is cost-effective to manufacture.
  • an electronically controlled pedal assembly is provided that utilizes an induction sensor to sense a change in position of the pedal arm that is small in size and can be efficiently packaged in a pedal control with a hysteresis device.
  • the induction sensor is contained within a cap mounted to the housing of the electronically controlled pedal assembly.
  • FIG. 1 is a perspective view of an electronically controlled pedal assembly, according to the present invention
  • Fig. 2 is a side view of the pedal assembly of Fig. 1 with one example of a hysteresis device, according to the present invention
  • Fig. 3 is a side view of the pedal assembly of Fig. 1 with another embodiment of a hysteresis device, according to the present invention
  • Fig. 4 is a side view of the pedal assembly of Fig. 1 with still another embodiment of a hysteresis device, according to the present invention
  • Fig. 5 is a side view of the pedal assembly of Fig. 1 with yet still another embodiment of a hysteresis device, according to the present invention
  • Fig. 6 is a perspective view of a further embodiment of an electronically controlled pedal assembly with a hysteresis device, according to the present invention
  • Fig. 7 is a side view of the hysteresis device for the pedal assembly of Fig. 6, according to the present invention
  • Fig. 8 is a side view of the friction spacer of Fig. 7, according to the present invention
  • Fig. 9 is a sectional front view of the pedal assembly of Fig. 6, according to the present invention.
  • Fig. 10 is an exploded view of the cap assembly with induction sensor, according to the present invention.
  • Fig. 11 is a perspective view a cap assembly having an induction sensor for the pedal assembly of Fig. 1, according to the present invention.
  • an electronically controlled pedal assembly is illustrated. It should be appreciated that in this example the electronically controlled pedal is a throttle pedal, although other types of pedals are contemplated, such as brake pedal, a clutch pedal, or the like.
  • the electronic throttle control pedal assembly 10 of this example transmits a signal from the driver to a throttle controller (not shown) regarding movement of the vehicle.
  • the pedal assembly 10 includes a housing 12 having a front wall 14 with tabs 16 for mounting the pedal assembly 10 to a vehicle (not shown). Extending from an edge of the front wall 14 at the top of the housing is friction wall 18 having an arcuate shape and a radius of curvature centered at a pedal arm pivot point 20.
  • the pedal assembly 10 includes a pedal arm 22 rotatably supported by a mounting means shown at 24.
  • the mounting means 24 rotatably supports the pedal arm 22, so that the pedal arm 22 rotates about the pedal arm pivot point 20.
  • Various examples of mounting means 24 are contemplated.
  • One example of a mounting means is a pivot pin.
  • Another example of a mounting means is a hub on each side of the pedal arm.
  • Still another example of a mounting means is a hub and post arrangement (to be described).
  • the pedal arm 22 includes a disk portion 26 at a pedal arm pivot point that extends outwardly in an axial direction.
  • the disk portion 26 includes a mounting means 24 for the pedal arm 22.
  • the mounting means 24 may be a pivot pin mounted to the housing and supporting the pedal arm.
  • the mounting means may include a post 31 extending radially from one side of the disc portion 26 at a pedal arm pivot point 20.
  • the post 31 includes a longitudinally extending bore 28 extending partially therethrough for receiving a position sensing device 70.
  • the post 31 is supported by the housing.
  • the opposite side of the pedal arm disk portion 26 includes a longitudinally extending bore (not shown) for receiving another post 33 integrally formed in the housing.
  • the mounting means may include a bushing 30.
  • the pedal arm 22 extends through an opening in the housing 12.
  • the pedal arm 22 includes an upper pedal arm 32 extending radially from an edge of the disc portion 26 towards the friction wall 18.
  • the pedal arm 22 also includes a lower pedal arm 34 extending radially from the edge of the disc portion 26.
  • a pedal pad 36 that is actuated by a driver's foot (not shown) is attached to a distal end of the lower pedal arm 34 using an attaching means, such as a pivot pin or the like.
  • the electronically controlled pedal assembly 10 further includes a hysteresis generating device 38.
  • the upper pedal arm 32 is operatively in communication with the hysteresis device 38.
  • the hysteresis device includes a friction lever 40 pivotally mounted to a distal end of the upper pedal arm 32 at a friction lever pivot point shown at 42.
  • the friction lever 40 includes an integrally formed main member 40a, an upper member 40b extending radially from an upper edge of the main member 40a and a lower member 40c extending radially from a lower edge of the main member 40a.
  • the distal end of the lower member 40c is pivotally connected to the upper pedal arm 32 at the friction lever pivot point 42.
  • the upper member 40b has an arcuate shape that is complementary with the shape of the inner surface of the housing friction wall 18.
  • the outer surface 40d of the upper member 40b is abraded like a brake shoe to frictionally engage the corresponding arcuate surface of the friction wall 18.
  • the friction lever 40 generally has an "S" shape, and is integral and formed as one piece.
  • the friction lever 40 is biased against the housing 12 as shown at 44 by a spring member 46.
  • the spring 46 is a compression spring, and is positioned between the friction lever 40, and in particular the main portion of the friction lever 40 and a rear wall 48 of the housing 12.
  • the spring 46 is fixedly mounted to the housing 48 and friction lever 40 so that it extends between the housing 12 and the friction lever 40 to generate greater friction.
  • the disk portion 26 of the pedal arm 22 rotates and the spring 46 is compressed between the friction lever 44 and rear wall 48 of the housing 12.
  • the force of the spring 46 works in opposition to the force of the arm to pivot the friction lever 40 slightly.
  • the arcuate portion 40d of the friction lever 40 is canted slightly with respect to the arcuate surface 18a of the friction wall 18 like a cam to generate friction.
  • the electronically controlled pedal assembly 10 further includes a position sensing device 70 operatively supported by the mounting means 24 at the pedal arm pivot point 24.
  • the sensing device 70 is used to sense the rotational movement of the pedal arm 22, which is indicative of the relative pedal position, and transmit a signal to a control means (not shown) to operatively control a throttle controller (not shown) and thus the movement of the vehicle.
  • the signal is a proportional voltage signal.
  • the electronically controlled pedal assembly 10 may include a blade (not shown) operatively connected to the sensing device 70 to generate a signal indicative of the position of the pedal arm 22 during operation.
  • Various types of position sensing devices are known in the art to sense rotational movement.
  • One example of such a sensing device is a potentiometer.
  • Another example of a sensing device is an induction sensor.
  • the induction sensor utilizes inductance changes in a transducer circuit to produce an output signal representing the change in position of the pedal arm 22.
  • the induction sensor works well in harsh environments or in environments subject to fluctuations in temperature.
  • One example of an induction sensor utilizes a linear or a rotary variable differential transformer means, or a Hall effect detection of magnetic change, to convert a displacement or angular measurement to an electronic or electromagnetic signal. While these types of sensors work well, they require complex electronic circuitry to transduce a signal, and are expensive to manufacture.
  • Another example of an induction sensor is disclosed in U.S. Patent
  • This type of induction sensor utilizes a comparator-type relaxation oscillator circuit having a frequency controlled by variable inductance. Each oscillation of the circuit discharges a fixed amount of charge such that an increase in frequency increases the total current draw of the circuit.
  • An advantage of this induction sensor is that it includes a simplified circuit, so that it is simpler in design and may be reliably manufactured at a lower cost, and a smaller size.
  • Another advantage of this type of induction sensor is greater calibration accuracy since both electrical and mechanical trim may be implemented to calibrate the transducer output signal. Referring to Figs.
  • cap assembly 72 with an induction sensor 70 mounted to it is illustrated for use with an electrically controlled pedal assembly having a hysteresis device.
  • the cap assembly 72 includes a cap 74 configured to mate with the housing 12.
  • the cap includes a front face 71 having a radially extending alignment post 76 for operatively aligning the cap assembly 72 onto the mounting means 24 at the pedal arm pivot point 20.
  • the alignment post 76 is supported on a post by the mounting means, which in this example is a hub and post 31 arrangement.
  • the cap 74 also includes a plurality of radially extending mounting posts 78 arranged in a predetermined pattern for mounting the induction sensor
  • the cap 74 further includes at least one elongated slot 80 for fixedly securing the cap assembly 72 to the housing 12, such as by using a bolt, or the like.
  • the relative size and location of the slots 80 with respect to the alignment post 76 allow the cap assembly 72, and therefore the induction sensor 70, to be positioned relative to the housing 12.
  • the slot 80 allows for about 1 l degrees of rotation of the cap assembly 72.
  • the induction sensor 70 includes a pair of rotors, with a stator suspended between the rotors.
  • the first rotor 82 is a generally planar member with radially extending center post 84 that is hollow, and conductive plates 86 positioned on the planar member above the center post 84. It should be appreciated that the shape of the first rotor center post 84 corresponds to the shape of the aperture 28 in the pedal arm 22.
  • the second rotor 88 is a generally planar member, with conductive plates 90 positioned on the second rotor 88 relative to the conductive plates 86 of the first rotor 82, and positioned above a center mounting aperture 92.
  • the stator 94 is mounted onto a generally planar circuit board 96.
  • the previously described comparator-type relaxation oscillator circuit having a frequency controlled by variable inductance is disposed on the printed circuit board as shown at 98.
  • the circuit board includes mounting apertures 97 arranged in a predetermined manner to correspond with the mounting posts 78 on the cap 74, for mounting the circuit board 96 onto the cap 74.
  • the second rotor 88 slides over the post 76
  • the circuit board 96 is mounted onto the mounting posts 78 of the cap 74
  • the post 84 of the first rotor 82 is positioned over the alignment post 76 of the cap 74.
  • the stator 94 is suspended between the first and second rotors 82, 88, above the post 84 of the first rotor 82.
  • the cap assembly 72 may include a crossbar member 99, which in this example, is a generally planar member having a u-shape, that is suspended over the first rotor post 84 and assists in holding the cap assembly 72 together and absorbing any lateral load.
  • the alignment post 76 of the cap 74 is positioned on the mounting means 24, thereby fixing the position of the rotor 82, 88 relative to the pedal arm 22, while rotatable relative to the pedal arm 22.
  • the pedal arm 22 pivots about the pedal arm pivot point 20.
  • the induction sensor 70 senses the angular movement of the pedal arm 22 about the pedal arm pivot point 20, and transmits a proportional signal, such as a voltage signal, to a controller.
  • the controller analyzes the signal, and transmits a signal to the throttle controller instructing the throttle controller to actuate the throttle accordingly.
  • FIG. 3 another embodiment of an electronic throttle control pedal assembly 110 with a hysteresis device 138 is illustrated.
  • the pedal arm 122 includes an upper pedal arm 132 extending radially from the pedal arm disk 126 towards the friction wall 118.
  • the upper pedal arm 132 in this embodiment is longer than the upper pedal arm 32 in the previous embodiment.
  • a friction lever 140 is pivotally mounted to a distal end of the upper pedal arm 132 at a friction lever pivot point as shown at 142.
  • the friction lever 140 has a main member 140a, and an upper member 140b extending forwardly from the main portion 140a of the friction lever 140.
  • the upper member 140b is arcuate in shape and has a surface 140d complementary with an inner arcuate surface 118a of the friction wall 118.
  • the upper member arcuate surface 140d is abraded like a brake shoe to frictionally engage the friction wall 118a, which may also be abraded.
  • the pedal assembly 110 further includes a spring member 146, such as a compression spring, positioned between the main portion 140a of the friction lever 140 and a rear wall 148 of the housing 112.
  • a spring member 146 such as a compression spring
  • a rear surface of the friction lever is adapted to receive a spring, as well as the rear wall 148.
  • the inner and outer spring are used to create load in the system and hysteresis.
  • one of the springs fails, the other is still operational.
  • the disk portion 26 of the pedal arm rotates and the spring 146 is compressed between the friction lever 140 and rear wall 148 of the housing 112.
  • the force of the spring 146 works in opposition to the force of the pedal arm 112 to pivot the friction lever 140 slightly.
  • the arcuate portion 140d of the friction lever 140 is canted slightly with respect to the arcuate surface 118 of the friction wall 118a like a cam to generate friction.
  • the spring pressure on the rear wall of the friction lever 140a pivots the upper portion 140b into coaxial alignment with the friction wall 118 thereby reducing the friction between the frictional surface of the upper portion 140b and friction wall 118 and permitting return of the pedal arm 122 to a resting position.
  • the hysteresis is developed at a greater rate than in the previously described embodiment, since the pedal arm 122 travels through a greater arc with respect to the friction lever 140. As a result, there is greater interference between the frictional surfaces of the friction lever 140 and the inner surface of the friction wall 118. Referring to Fig.
  • the pedal arm 222 includes an upper pedal arm 232 extending radially from a pedal arm disk 226, and a lower pedal arm 234 also extending radially from the pedal arm disk 226.
  • the upper pedal arm 232, pedal arm disc 226 and lower pedal arm 234 are integral and formed as one.
  • the pedal assembly 210 includes a housing having a front wall 214, a friction wall 218 having an abraded surface 218a, and a rear wall 248.
  • the friction wall 218 may have an arcuate shape and a radius of curvature centered at a pedal arm pivot point 220.
  • the hysteresis device 238 includes a friction lever 240 that is pivotally mounted to the upper pedal arm 232 at a friction lever pivot point 242.
  • the friction lever 240 extends from an outer portion of the upper pedal arm 232 and curves rearwardly towards the rear wall 248 of the housing 212.
  • the friction lever 240 includes an abraded surface 240d, as previously described. This embodiment is distinguishable since the friction lever is biased against the friction wall 218 by a push arm 250 and a spring 246.
  • the hysteresis device 238 also includes a push arm 250 pivotally mounted to the upper pedal arm 232 at a push lever pivot point 252 that is radially inwards from the friction lever pivot point 242.
  • the push lever arm 250 curves upwardly and rearwardly towards the friction wall 218, so as to contact an under side of the friction lever 240 at a predetermined contact point, as shown at 241.
  • the contact point 241 is selected by the amount of frictional force desired. That is, increasing the distance between the contact point 241 and the friction lever pivot point 242 increases the amount of friction generated by the hysteresis device 238.
  • the system 210 also includes a spring 246 mounted between the rear wall 248 of the housing 212 and the push arm 250. The spring 246 forces the push arm 250 against the friction lever 240 to generate greater friction, as previously described.
  • the pedal arm 322 includes an upper pedal arm 332 extending radially from a pedal arm disk 326.
  • the pedal assembly 310 includes a housing 312 having a front wall 314, a friction wall 318, an upper wall 354 and a rear wall 348.
  • the friction wall 318 extends radially from the front wall of the housing 312.
  • the friction wall 318 is arcuate in shape and includes an arcuate friction surface 318a.
  • the friction wall 318 is spaced radially outwardly from the pedal arm disk 326, but inwardly from the end of the upper pedal arm 332.
  • the hysteresis device 338 includes a friction lever 340 having a main portion 340a pivotally mounted to the upper pedal arm 332 at a friction lever pivot point 342, and a lower portion 340c that angles inwardly and rearwardly from the upper pedal arm 332.
  • the lower portion 340c includes an arcuate friction surface 340d.
  • the arcuate friction surface 340d is complementary to the frictional surface 318a of the friction wall 318.
  • the pedal assembly 310 further includes a spring 346 extending between the rear wall of the housing 312 and the main portion 340a of the friction lever 340, as previously described with respect to Fig. 1.
  • the spring 346 is positioned beneath the friction lever pivot point 342 of the friction lever 340, so that the resultant force acting on the friction lever 340 directs the friction lever 340 downwardly against the friction surface 318a of the friction wall 318.
  • FIG. 6-9 a further embodiment of an electronic pedal assembly 410 with a hysteresis device is illustrated.
  • the adjustable pedal assembly 410 is pivotally mounted to a support bracket 460.
  • the pedal assembly 410 has a support arm 462 which extends between the bracket 460 and a pedal arm 422.
  • the pedal arm 422 is pivotally mounted to the support arm at a pedal arm pivot point 461.
  • the support arm 462 is pivotally mounted to the bracket 460 at the support arm pivot point 463 using a mounting means.
  • a pivot rod 464 extends between two flanges
  • the mounting means may also include a bushing to support the pivot rod 464.
  • One end of the rod 464 has a tab 468 extending out beyond one side of a flange 466 to engage a position sensing device, as previously described with respect to Fig. 1.
  • An example of a pedal assembly with a support arm is disclosed in commonly assigned U.S. Patent Application Number 10/080,006 which is incorporated herein in its entirety.
  • the hysteresis device 438 includes a coil spring 446 and friction spacer 470, as shown in Figs. 7-9.
  • the coil spring 446 is mounted onto the pivot rod 464 at the support arm pivot point 463.
  • the spring 446 is a torsion spring.
  • the coil spring 446 has two arms 472.
  • a hook 474 is formed in an end of one arm 472 for attachment to the support arm 462. The other arm rests against the inner wall of the bracket 460.
  • the friction spacer 470 includes a cylindrical member 476 having an outer helical flange 478.
  • the flange 478 has a thickness greater than the spacing between the coils of the spring, when the spring is in a resting position.
  • the friction spacer 470 is mounted between the coils of the coil spring 446, so that the flange 478 extends into the helical space between each coil of the spring 446, as shown at 480.
  • the friction spacer is cut radially as shown at 482, so that it can be compressed together for ease of insertion into the coils of the spring 446. Once in position, the friction spacer 470 is allowed to expand so that the helical flange 478 fills the spacing 480 between the coils of the spring 446.
  • the friction spacer 470 is made of a moldable material such as polyester.
  • the pedal assembly may include various combinations of the hysteresis and position sensing means previously described.
  • the pedal assembly 10 may include the hysteresis devices described with respect to any one of Figs. 1-9 and an induction position sensing means, such as a potentiometer.
  • the pedal assembly includes any one of the hysteresis devices described with respect to Figs. 1-9 and an induction position sensing means, such as one described with respect to Figs. 10-11.
  • the pedal assembly may include other components that are known in the art, such as an adjustable pedal height mechanism 484 or electrical connectors, or the like.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Control Devices (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

L'invention concerne un ensemble pédale à commande électronique équipé d'un dispositif d'hystérésis. Cet ensemble pédale comprend un logement pourvu d'une paroi avant ainsi que d'une paroi de frottement arquée qui présente un rayon de courbure dont le centre correspond à un point de pivotement de bras de pédale et qui s'étend à partir d'un bord de ladite paroi avant. L'ensemble pédale comporte également un bras de pédale qui est supporté de manière rotative au niveau dudit point de pivotement de bras de pédale par un moyen de montage relié de manière fonctionnelle audit logement, ainsi qu'un moyen de génération d'hystérésis qui est monté de manière pivotante sur le bras de pédale. L'ensemble pédale selon l'invention comprend en outre un ressort qui est disposé entre le logement et le moyen de génération d'hystérésis, de façon à solliciter le moyen de génération d'hystérésis vers le logement, de sorte que l'enfoncement du bras de pédale compresse ce ressort et génère simultanément une force d'hystérésis de frottement croissante entre la paroi de frottement arquée et le moyen de génération d'hystérésis qui subit une translation arrière par l'intermédiaire du bras de pédale, et de manière que le relâchement du bras de pédale réduise ladite force d'hystérésis de frottement.
EP03764776A 2002-07-17 2003-07-17 Commande d'accelerateur electronique comprenant un dispositif d'hysteresis Expired - Lifetime EP1546528B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US39662302P 2002-07-17 2002-07-17
US396623P 2002-07-17
US41350402P 2002-09-25 2002-09-25
US413504P 2002-09-25
PCT/US2003/022323 WO2004007929A2 (fr) 2002-07-17 2003-07-17 Commande d'accelerateur electronique comprenant un dispositif d'hysteresis

Publications (3)

Publication Number Publication Date
EP1546528A2 true EP1546528A2 (fr) 2005-06-29
EP1546528A4 EP1546528A4 (fr) 2011-06-29
EP1546528B1 EP1546528B1 (fr) 2012-11-14

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EP03764776A Expired - Lifetime EP1546528B1 (fr) 2002-07-17 2003-07-17 Commande d'accelerateur electronique comprenant un dispositif d'hysteresis

Country Status (6)

Country Link
US (2) US7216563B2 (fr)
EP (1) EP1546528B1 (fr)
CN (1) CN1682173B (fr)
AU (1) AU2003251979B2 (fr)
HK (1) HK1076140A1 (fr)
WO (1) WO2004007929A2 (fr)

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EP1546528A4 (fr) 2011-06-29
AU2003251979A1 (en) 2004-02-02
EP1546528B1 (fr) 2012-11-14
WO2004007929A2 (fr) 2004-01-22
AU2003251979B2 (en) 2008-02-28
US7216563B2 (en) 2007-05-15
HK1076140A1 (en) 2006-01-06
US20050247158A1 (en) 2005-11-10
US7337692B2 (en) 2008-03-04
US20070137399A1 (en) 2007-06-21
WO2004007929A3 (fr) 2004-04-08
CN1682173B (zh) 2011-08-17
CN1682173A (zh) 2005-10-12

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